1. 2d+8=24
First you have to get rid of 8 it is positive the opposite of it is negative so 8-8=0 What you do to one side you do to the other 24-8=16 you have 2d so when they are side by side you multiple the opposite is to divide so 16÷2=8 Therefore the answer is B. D=8
I don't have time to show you the rest but the answers are
2.D.g=30
3.k=3
Sorry I haven't found out the rest!!